If I leave my PC about 10-30 minutes without doing something, it resets itself!!!
Just what I did a clean install of Windows 10 yesterday. I admit that my rig is really old and "outdated".
Yes this could also be caused by a buggy driver but old machines usually suffer from failing hardware issues. As I said before please post your complete system specs if you want to get more precise advise on what to do or test.
Check your temps. You system may be overheating. If the temps are fine then the motherboard or the PSU may be failing which is a common issue in old and outdated PCs. Please post your complete system specs in order to get more accurate advice.
I checked the temp before. They are normal. The "thing" is when I playing games like NFS ProStreet, even NFS Payback, my PC it doesn't restart itself at all!! I had Windows 7 before as my daily OS. I didn't have that kind of problem then before.
Yes this could also be caused by a buggy driver but old machines usually suffer from failing hardware issues. As I said before please post your complete system specs if you want to get more precise advise on what to do or test.